Low idle on 2003 CRV EX?
 

My 2003 EX CRV engine runs slightly rough when sitting in traffic (in Drive), or just idling in Park.

Also , it rolls backward when idling (in Drive)on a slope or hill.

I have 11000 miles on it and have the problem since I purchased the car.

No hills where I live in Florida , just noticed that part of the problem on a trip up North.

The Tach reads about 450-500 rpm at idle in Park.

Is this too low?

Is a dealer visit necessary?

Thanks.

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JADAHADA